Nov 30 On this day in history work begins on 1st US underwater highway tunnel, Chicago

Nov 30 In the year 1866 work begins on first US underwater highway tunnel, Chicago

Nov 30 Work on the first underwater highway tunnel in the United States began on this day in Chicago, Illinois. Over a three-year period, workers and engineers tunneled underneath the Chicago River, finally completing the 1,500-foot tunnel at a cost of over $500,000 in the year 1866.